Oil burner



Aug. 3 1926. 1,595,012

L.. LITHMAN OIL BURNER Filed August 19. i924 Patented Aug. 3, 1926.

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LEOPOLD LITHMAN, OF WORCESTER, MASSACHSETTS.

1 OIL BURNER.

Application filed August 19, 1,524. Serial No. 732.377.

This invention relates to a self-regulating oil burner, adapted for general use, but particularly adapted fo-r burning oil or other liquid fuel in appliances for housek heating purposes.

The principal object of the invention is to provide a burner adapted to be regulated by a current of air under pressure, so that the higher the air pressure, the greater the feed of oil. The invention also involves mechanism by which this result is secured in a simple and etiicient manner and with the use of comparatively few parts and of a nature not likely to get out of order or need much adjustment. The invention also involves the use of a single air pipe with a plurality of oil burners.

Reference is to be had to the accompanying drawings in which Fig. 1 is a plan of a single burner constructed in accordance with thispinvention with the cover removed;

F ig. 2 is a central sectional view of the same on the line 2-2 of Fig. 1; and

Fig. 3 is a view similar to Fig. 1, showing how the invention can be applied to a plurality of oil burners.

Referring first to Figs. 1 and 2, I have shown a single oil burner and nozzle com'- prising a pipe or casing 10, for receiviing the oil from a. pipe 16 connected with the source of supply. Closing the bottom of this casing there is a screw plug 12 which supports a spring 13 bearing against a valve 14 for controlling t-he flow of oil into a longitudinally movable discharge tube 15, which constitutes the nozzle. The valve has a cylindrical projecting end transversely .slit at 19 which bears against the bottom of the tube and moves inwardly with it. The valve is located in an enlarged space to admit the oil when the circular edge of the valve is pushed back from its seat 18. The valve also has a guide tube 11 fixed on its lower end for receiving a guide rod 17.

If the valve 14 is forced back against the resistance of the spring, oil will be admitted over and around the valve intothe nozzle 15, to the outlet thereof. The nozzle extends through a plate 21, which is perforated for that purpose and which constitutes the end of al casing 22. This casing is all enclosed an-d is provided with two openings, one for the pipe or casing 10 and the other for a compressed air pipe 23. This air pipe conducts compressed air into the interior of the casing 22. At the discharge end of the pipe 23 there is a freely movable valve 24, which is operated with the iiow of air past it. This valve is mounted on a lever 25 pivoted at 26 in the casing and pivotally connected at the other end with the nozzle 15. Therefore the valve 111 lis operated by it.

It will be observed that as the air pressure forces the valvel outwardly the lever 25 will force the valve 111 inwardly away from its seat to admit more oil to the valve. The air escapes.v around the nozzle through passages 27 to form a combustible mixture or spray with the oil. By thisv mechanism the flow of oil is caused to increase or decrease in proportion to the increase or decreasevof the air pressure. The reasons for this are well known and need not be cxplained further. i

Fiom 3 is presented for the purpose of showing a multiple burner constructed in accordance with this invention. Here the air arrangement is exactly the same as in Fig. 1. A single air pipe being used and single lever 25 but this lever, instead of acting on a single valve, operates on a bar 30 which is connected with three nozzles 2G and therefore with three valves 14, and operates them all alike in proportion to the degree of air pressure. This will be understood readilyv as the lever 25 is pivo-ted on the rod 26 and that rod has bearings at bothends so that it is not free to wabble.

Although I have illustrated and describe-d only two forms of the invention, l am aware of the fact that other modifications can be made therein by any person skilled in the art without departing?.` from the scope of the invention as expressed in the claims.

Therefore l do not wish to be limited to all the details of construction shown, but what I do claim is 1. In an oil burner, the combination with an air pipe and an oil pipe, of a movable nozzle constituting the outlet for the oil pipe, means for conducting the air from the air pipe and discharging it around the nozzle outlet, a valve mounted tomove with the nozzle for controlling the admission of oil to the nozzle.I a movable valve at the discharge end or" the air pipe past which the air is conducted from the air pipe and dis-- charged around the outlet end of the nozzle, and means connected with the air valve and the nozzle for controlling the position of the oil valve in proportion tothe pressure of the air.

2. In an oil burner, the combination with an air pipe and an oil pipe, of a movable nozzle constituting the outlet for the oil pipe, a valve mounted to move with the nozzle for allowing the admission of oil to the nozzle, a valve at the discharge end of the air pipe, and a lever on which the last named valve is mounted having its other end connected with the nozzle for controlling the iiow of the oil through the nozzle in proportion to the pressure of the air.

3. In a liquid fuel burner, the combination with a casing, an oil pipe and an air pipe terminating therein, of a valve at the discharge end of the air pipe for controlling the discharge of air therefrom, a lever connected with said valve, a valve in the fuel pipe for controlling the discharge of fuel therefrom, a nozzle through which the fuel is discharged, and means connected with said lever for operating the valve in the fuel pipe. I

4. In a liquid fuel burner, the combination with an oil pipe, an air pipe and a casing connecting them, of a valve at the end of the air pipe, a lever connected with said valve and located in the casing, whereby the lever will oscillate with variations in the pressure of the air, a valve in the fuel pipe for controlling the discharge of fuel therefrom, a nozzle through which the fuel is discharged, means connected with said lever for operating the valve in the fuel pipe, and means for permitting the discharge of the air from the casing around the nozzle to form a combustible mixture.

5. In a liquid fuel burner, the combination with a compressed air pipe and a liquid fuel supply pipe arranged parallel to each other, of a casing surrounding the ends of said pipes and having a space therein for conducting the air from the air pipe to the end of the fuel pipe, a nozzle for discharging the fuel and means whereby the pressure ofthe air discharged from the air pipe controls the amount of fuel entering the nozzle from the source of supply. Y

6. ln a liquid fuel burner, the combination with a compressed air pipe and a liquid fuel supply pipe arranged parallel to and at a distance from each other, of a casing surrounding the ends of said pipes and having a space therein between the pipes for conducting the air from the air pipe to the end of the fuel pipe in a transverse path, a nozzle for discharging the fuel, and means whereby the pressure of the air discharged from the air pipe controls the amount of fuel entering the nozzle from the source of supply.

ln testimony whereof l have hereunto affixed my signature.

LEOPOLD LTHMAN. 

